diff --git a/qiita_db/artifact.py b/qiita_db/artifact.py
index 7b70f35b1..9cc271bbc 100644
--- a/qiita_db/artifact.py
+++ b/qiita_db/artifact.py
@@ -1214,8 +1214,10 @@ def _add_edge(edges, src, dest):
                                 nodes[job.id] = ('job', job)
 
                     elif n_type == 'job':
-                        # Ignore the generate summary jobs
-                        if n_obj.command.name == 'Generate HTML summary':
+                        # Ignore the generate summary and delete jobs
+                        # (they don't create new artifacts)
+                        if n_obj.command.name in {'Generate HTML summary',
+                                                  'delete_artifact'}:
                             continue
                         jstatus = n_obj.status
                         # If the job is in success we don't need to do anything
diff --git a/qiita_pet/static/js/networkVue.js b/qiita_pet/static/js/networkVue.js
index 95fe5b4f8..f43b521ef 100644
--- a/qiita_pet/static/js/networkVue.js
+++ b/qiita_pet/static/js/networkVue.js
@@ -44,7 +44,10 @@ function formatNodeLabel(label) {
  **/
 function toggleNetworkGraph() {
   if($("#processing-network-div").css('display') == 'none' ) {
-    $("#processing-network-instructions-div").show();
+    // if we are displayin the waiting page, do not show the instructions
+    if (!$("#processing-network-div").html().includes('waiting')){
+      $("#processing-network-instructions-div").show();
+    }
     $("#processing-network-div").show();
     $("#show-hide-network-btn").text("Hide");
   } else {
@@ -736,8 +739,8 @@ Vue.component('processing-graph', {
           'shape': 'data(shape)',
           'text-opacity': 0.7,
           'text-wrap': "wrap",
-          'border-color': '#BBBBBB',
-          'border-width': '1px'
+          'border-color': '#333',
+          'border-width': '3px'
         }}, {
         selector: 'edge',
         style: {
@@ -761,6 +764,7 @@ Vue.component('processing-graph', {
           container: container,
           minZoom: 1e-50,
           maxZoom: 2,
+          wheelSensitivity: .3,
           layout: layout, style: style,
           elements: {
             nodes: vm.nodes,
@@ -1097,7 +1101,6 @@ Vue.component('processing-graph', {
     };
 
     show_loading('processing-network-div');
-    $("#processing-network-div").hide();
     $("#processing-network-instructions-div").hide();
 
 
diff --git a/qiita_pet/templates/workflows.html b/qiita_pet/templates/workflows.html
index e2f852585..5ef919571 100644
--- a/qiita_pet/templates/workflows.html
+++ b/qiita_pet/templates/workflows.html
@@ -17,8 +17,8 @@
     'background-color': 'data(color)',
     'text-opacity': 0.7,
     'text-wrap': "wrap",
-    'border-color': '#BBBBBB',
-    'border-width': '1px'
+    'border-color': '#333',
+    'border-width': '3px'
   }}, {
   selector: 'edge',
   style: {
@@ -82,6 +82,7 @@ <h4>
           <script type="text/javascript">
             var cy_network_{{i}} = cytoscape({
               container: document.getElementById('workflow_{{i}}'),
+              wheelSensitivity: .3,
               layout: layout, style: style,
               elements: {
                 nodes: [